<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  
</head>
<body>
  <div id="app">
  
    <!-- <div v-bind:class="a" v-bind:a="b"></div> -->
    <div :class="a" :a="b"></div>
    <label for="meinv1">佳丽1</label>
    <input type="radio" v-model="imgSrc"  id="meinv1"  value="http://kr.shanghai-jiuxin.com/file/mm/20210503/r55j2sfphug.jpg">
    <label for="meinv2">佳丽2</label>
    <input type="radio" v-model="imgSrc" id="meinv2" value="http://kr.shanghai-jiuxin.com/file/mm/20210503/s0qmfwxrhkv.jpg">

    <img :src="imgSrc" width="200" alt="">
  </div>
  <script src="./vue.js"></script>
  <script>
    const vm = new Vue({
      el: '#app',
      data: {
        a:"box",
        b:'自定义属性的值',
        imgSrc:''
      }
    })
  
  </script>
</body>
</html>